2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/227402The SELEX experiment (Fermilab E781) is a 3-stage magnetic spectrometer for the study of charm hadroproduction at large x_F using 600GeV/c Sigma-, pi-, and p beams. New precise measurements of the Lambda_c, D0, and Ds lifetimes are presented. Results on Lambda_c and D_s production for x_F>0.2 are reported as well. The spectrometer was also used for hyperon physics, where we will show measurements of the Sigma- charge radius, the polarization of inclusive produced Lambda's, and the polarization of beam Sigma+.12 pages, 1 included figure. Contribution to Prceedings of Heavy Quarks at Fixed Target, Rio de Janeiro, Oct. 9-19, 2000High Energy Physics - Experimenttext